//
//  Atom.h
//  4.7Practice
//
//  Created by mac on 4/7/16.
//  Copyright (c) 2016 liuchengming. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface Atom : NSObject

@property (readonly) NSUInteger protons;
@property (readonly) NSUInteger neutrons;
@property (readonly) NSUInteger electrons;
@property (readonly) NSString *chemicalElement;

@end
